ES8302039A1 - Process for the preparation of polyols with at least one oxacyclopentane ring. - Google Patents

Process for the preparation of polyols with at least one oxacyclopentane ring.

Info

Publication number
ES8302039A1
ES8302039A1 ES506841A ES506841A ES8302039A1 ES 8302039 A1 ES8302039 A1 ES 8302039A1 ES 506841 A ES506841 A ES 506841A ES 506841 A ES506841 A ES 506841A ES 8302039 A1 ES8302039 A1 ES 8302039A1
Authority
ES
Spain
Prior art keywords
reaction
water
oxacyclopentane
temperature
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES506841A
Other languages
Spanish (es)
Other versions
ES506841A0 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever Bestfoods North America
Original Assignee
Unilever Bestfoods North America
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever Bestfoods North America filed Critical Unilever Bestfoods North America
Publication of ES506841A0 publication Critical patent/ES506841A0/en
Publication of ES8302039A1 publication Critical patent/ES8302039A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
    • C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
    • C07D493/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D307/18—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/20—Oxygen atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

1. A process for preparing polyoles having at least one oxacyclopentane ring of the generic formula see diagramm : EP0052295,P5,F1 wherein R**1 is a hydroxyl group or the ether oxygen atom of a second oxacyclopentane ring, and R**2 being a hydrogen atom, a hydroxymethyl group or a bivalent radical of the formula -CH2 -CHOH- whereby in the latter case R**1 is a ether oxygen atom and R**1 and R**2 together with the carbon atoms with which they are attached form a second oxacyclopentane ring, by cleavage of water from sugar alcohols having 4 to 6 carbon atoms at elevated temperature in presence of a strongly acidic heterogeneous catalyst and in absence of organic solvents, outside water being introduced with the starting materials and during the reaction formed reaction water being at least partly distilled from the reaction mixture during the reaction, characterized in that the reaction is carried out in a melt liquid reaction system - preferably under reduced pressure - at temperature of no more than 160 degrees C, with the proviso that the temperature is selected in dependency of the pressure in such a way that prior to the completion of the reaction and the separation of the catalyst, respectively, essentially no distillation preparation of polyole reaction product(s) from the reaction mixture takes place.
ES506841A 1980-11-05 1981-11-04 Process for the preparation of polyols with at least one oxacyclopentane ring. Expired ES8302039A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3041673A DE3041673C2 (en) 1980-11-05 1980-11-05 Process for the preparation of 1,4-anhydrotetrites, 1,4-anhydropentites or 1,4; 3,6-dianhydrohexites

Publications (2)

Publication Number Publication Date
ES506841A0 ES506841A0 (en) 1983-01-16
ES8302039A1 true ES8302039A1 (en) 1983-01-16

Family

ID=6115990

Family Applications (1)

Application Number Title Priority Date Filing Date
ES506841A Expired ES8302039A1 (en) 1980-11-05 1981-11-04 Process for the preparation of polyols with at least one oxacyclopentane ring.

Country Status (8)

Country Link
EP (1) EP0052295B1 (en)
BR (1) BR8107183A (en)
DE (2) DE3041673C2 (en)
DK (1) DK452581A (en)
ES (1) ES8302039A1 (en)
FI (1) FI79306C (en)
YU (1) YU42591B (en)
ZA (1) ZA817113B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111092A1 (en) 1981-03-20 1982-09-30 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING 1.4-3.6-DIANHYDRO-HEXITOLS
DE3229412A1 (en) * 1982-08-06 1984-02-09 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING DIANHYDROHEXITOL MIXTURES FROM HEXITOLS, DIANHYDRO-HEXITOL MIXTURES CONTAINING DIANHYDRO IDITES AND THE USE THEREOF FOR PRODUCING POLYMERS
DE3230349A1 (en) * 1982-08-14 1984-02-16 Maizena Gmbh, 2000 Hamburg METHOD FOR OBTAINING PURE CRYSTALLINE ANHYDROPENTITE, MONO- AND / OR DIANHYDROHEXITE
DE3233086A1 (en) * 1982-09-07 1984-03-08 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING POLYURETHANE ELASTOMERS USING DIOLES OF THE DIANHYDRO-HEXIT SERIES IN CONNECTION WITH POLYOXYALKYLENE-POLYDIALKYLSILOXANE COPOLYMERS
DE3302603A1 (en) * 1983-01-27 1984-08-02 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING POLYURETHANE ELASTOMERS USING DIOLS OF THE ANHYDRO-TETRITE SERIES
FR2617846B1 (en) * 1987-07-07 1992-07-17 Beghin Say Sa PROCESS FOR THE PREPARATION OF ANHYDRIDES OF HEXITOLS, HEXONOLACTONES AND HEXOSIDES
NL1015119C2 (en) * 2000-05-04 2001-11-06 Inst Agrotechnologisch Onderzoek Ato Dlo Improved synthesis of anhydroglycitol esters with improved color.
FR2810040B1 (en) * 2000-06-09 2004-04-09 Roquette Freres PROCESS FOR PURIFYING A COMPOSITION CONTAINING AT LEAST ONE PRODUCT OF INTERNAL DEHYDRATION OF A HYDROGENIC SUGAR

Also Published As

Publication number Publication date
ZA817113B (en) 1982-09-29
EP0052295A2 (en) 1982-05-26
BR8107183A (en) 1982-07-20
DE3170424D1 (en) 1985-06-13
DK452581A (en) 1982-05-06
ES506841A0 (en) 1983-01-16
EP0052295B1 (en) 1985-05-08
FI79306B (en) 1989-08-31
DE3041673A1 (en) 1982-06-03
FI79306C (en) 1989-12-11
EP0052295A3 (en) 1982-08-25
YU42591B (en) 1988-10-31
YU262381A (en) 1983-06-30
FI813442L (en) 1982-05-06
DE3041673C2 (en) 1983-12-08

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19960603